LeetCode[389]Find the Difference

Given two strings s and t which consist of only lowercase letters.

String t is generated by random shuffling string s and then add one more letter at a random position.

Find the letter that was added in t.

Example:

Input:
s = "abcd"
t = "abcde"

Output:
e

Explanation:
'e' is the letter that was added.

class Solution {
public:
char findTheDifference(string s, string t) {
sort(s.begin(), s.end());
sort(t.begin(), t.end());
int i;
for (i = 0; i < s.size(); i++)
if (s[i] != t[i])
break;
return t[i];
}
};